CN111894672B - Method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling - Google Patents
Method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling Download PDFInfo
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- CN111894672B CN111894672B CN202010815915.3A CN202010815915A CN111894672B CN 111894672 B CN111894672 B CN 111894672B CN 202010815915 A CN202010815915 A CN 202010815915A CN 111894672 B CN111894672 B CN 111894672B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000005553 drilling Methods 0.000 title claims abstract description 79
- 238000000926 separation method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims description 20
- 238000009825 accumulation Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 230000032798 delamination Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
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Abstract
The invention discloses a method for treating water damage of a roof separation layer of a stope in advance by adopting ground drainage drilling. Aiming at the roof separation water inrush hazard of a stope, ground drainage drill holes are arranged in a to-be-mined area of a working face by combining the mining condition of the working face, the overburden characteristic, the hydrogeological condition and the like, so that the water level of a aquifer is drained, planned advanced drainage of the working face is realized, and the water inrush hazard of the working face is reduced; in order to increase the overall strength of the ground drain hole and reduce the risk of casing deformation and breakage caused by rock stratum movement, high-strength crushed stones are filled into the ground drain hole, and a perforated pipe is arranged under the secondary drilling hole for water absorption, so that the completeness and smoothness of a drain channel are ensured, and the situation of drilling hole plugging is prevented; a water storage tank is arranged on the bottom plate of the machine/air way, and a drill hole is drilled into the water storage tank of the bottom plate, so that the leaked water is prevented from polluting the working environment.
Description
Technical Field
The invention relates to a method for draining water in a mine, in particular to a method for controlling water damage of a roof separation layer of a stope in advance by adopting ground water drainage drilling.
Background
Various coal mine safety issues encountered during coal mining have severely limited the development of the coal industry. Among them, water damage, fire, coal dust, gas accidents, and roof accidents are the five main disasters in coal mines, and also the main safety problems affecting coal mine production.
Among the five coal mine safety problems, coal mine water damage refers to a disaster phenomenon that various surface water or underground water gushes or is fed into the underground during coal mine production, so that normal and safe production of coal mines is affected. In recent years, water permeability accidents of coal mines frequently occur, the reason for the accidents is mainly that measures are not taken in time after water permeability symptoms occur in the stoping process, and a top plate collapses due to the increase of the suspended area under the action of the pressure of overlying rock mass and old empty water body, so that water burst is caused. Therefore, the research on the treatment of the water disaster of the roof is the key of the safe production of the mine.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a method for treating water damage of a roof separation layer of a stope in advance by adopting ground drainage drilling.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for advanced treatment of roof separation water damage of a stope by adopting ground drainage drilling is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: calculating the development height of the water guide crack belt after the working face is mined according to the working face parameters and the stratum conditions, analyzing the stratum possibly developing the separation layer, and judging the influence of the related aquifer on the water filling of the separation layer;
step two: drilling machines are respectively arranged on the ground surfaces corresponding to the machine/air tunnels on the two sides of the working face in a staggered mode at a certain distance;
step three: the drilling machine is used for vertically drilling holes from the top to the bottom of the ground surface, the drilling holes comprise primary drilling holes and secondary drilling holes, and the diameter of the primary drilling holes is larger than that of the secondary drilling holes. Embedding a primary casing in the primary drilling hole, drilling the primary drilling hole to a stratum possibly developing a separation layer, and isolating and sealing the primary casing outside by adopting a cement sealing area in order to prevent the influence of a loose layer on the primary casing;
step four: designing and constructing a secondary drilling hole after the primary drilling hole is qualified, designing the aperture of the secondary drilling hole according to the stratum condition, and putting a secondary sleeve into the secondary drilling hole and downwards drilling the secondary sleeve to the position of a water storage tank of a machine/air way bottom plate;
step five: adding high-strength crushed stones into the drilled secondary drill hole to prevent a mudstone layer in the stratum from softening and disintegrating when encountering water and entering the drill hole to cause plugging, avoiding damage to a hole body structure due to rock stratum movement caused by coal seam excavation, filling the secondary drill hole with the high-strength crushed stones, and adding a stone isolation net at the intersection of the secondary drill hole and the primary drill hole;
step six: a water storage tank is arranged at the bottom plate of the machine/air way, water in the secondary sleeve seeps out from the water seepage area, and the seeped water is collected by the water storage tank and then is discharged through a pipeline;
step seven: and (4) after the drilling arrangement is finished, immediately carrying out dredging and descending work of the aquifer, and reducing the water level of the aquifer to be below a safety value so as to realize the closure of the water in the aquifer to the separated layer water accumulation area.
Furthermore, the water drainage drill holes are arranged in the area to be mined in the coal seam, the drilling machines are staggered by 100-150 m and are respectively arranged on the earth surface above the working face machine/air way, and the interval between the two drilling machines is 200-300 m.
Further, the drainage bore hole is mainly used for the aquifer which has direct and indirect influence on the working surface.
Furthermore, the secondary casing pipe absorbs the water body in the aquifer in the form of a thick-wall perforated pipe casing pipe, can prevent the drilled hole from being blocked when the drilled hole passes through a mud rock stratum, and can also prevent the hole body structure from being damaged due to the influence of rock stratum movement.
And further, drilling a primary drilling hole to a position 10-20 m below the bottom boundary of the bedrock layer.
Furthermore, the water storage tank is arranged below the machine/air way bottom plate and serves as a temporary storage point for water in the drill hole, and the drill hole is drilled downwards to the position of the water storage tank of the working face machine/air way bottom plate, so that the water in the drill hole can be prevented from being sprayed into the crossheading or the working face, and the working environment is prevented from being deteriorated.
Compared with the prior art, the invention has the following beneficial effects: the invention adopts a form of secondary downward-entering thick-wall perforated pipe casing, absorbs or extrudes the water body in the overlying strata aquifer by means of the thick-wall perforated pipe, and fills high-strength crushed stone in the secondary drilling part, thereby reducing the risks of casing deformation and breakage caused by rock stratum movement and avoiding drilling hole plugging when the drilling hole passes through a mudstone section; the arrangement mode can avoid the condition that certain working surfaces are changed from single-point or small-range water outlet into multi-point water outlet or large-range water outlet; the drill hole is drilled to the water storage tank arranged in the machine and the air way, so that water in the drill hole can be prevented from being sprayed into the crossheading or the working surface, and the working environment is prevented from being deteriorated.
Drawings
FIG. 1 is a cross-sectional view of a formation of the present invention taken at an angle to the coal seam.
FIG. 2 is a cross-sectional view of a leading drainage borehole of the present invention.
In the figure: 1. a loose layer; 2. a basal rock layer; 3. formations that may develop delamination; 4. a water-conducting fracture zone; 5. a collapse zone; 6. a coal seam; 7. draining and drilling; 8. a cement seal area; 9. a primary sleeve; 10. a stone isolation net; 11. a delamination water accumulation area; 12. a secondary sleeve; 13. high strength crushed stone; 14. a machine/air lane; 15. a water storage tank; 16. a water seepage area.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The technical scheme provided by the invention as shown in figures 1 and 2 is as follows, the method for treating the water damage of the roof separation layer of the stope in advance by adopting the ground drainage drilling comprises the following steps:
the method comprises the following steps: calculating the development height of the water guide crack belt 4 after the working face is mined according to the working face parameters and the stratum conditions, analyzing the stratum 3 which is likely to develop a separation layer, and judging the influence of a related aquifer on the water filling of the separation layer;
step two: drilling machines are respectively arranged on the ground surfaces corresponding to the machine/air tunnels 14 on the two sides of the working face in a staggered mode at a certain distance;
step three: the drilling machine is used for vertically drilling holes from the top to the bottom of the ground surface, the drilling holes comprise primary drilling holes and secondary drilling holes, and the diameter of the primary drilling holes is larger than that of the secondary drilling holes. A primary casing 9 is embedded in the primary drill hole, the primary drill hole is drilled on the stratum 3 which is likely to develop a separation layer, and in order to prevent the influence of the unconsolidated layer 1 on the primary casing 9, a cement sealing area 8 is adopted outside the primary casing 9 for isolation and sealing;
step four: designing and constructing a secondary drilling hole after the primary drilling hole is qualified, designing the aperture of the secondary drilling hole according to the stratum condition, and putting a secondary sleeve 12 into the secondary drilling hole and downwards drilling the secondary drilling hole to the position of a water storage tank 15 of the bottom plate of the machine/air way 14;
step five: adding high-strength crushed stone 13 into the drilled secondary drill hole to prevent a mudstone layer in the stratum from softening and disintegrating when encountering water and entering the drill hole to cause plugging, avoiding damage to a hole body structure due to rock stratum movement caused by coal seam excavation, filling the secondary drill hole with the high-strength crushed stone 13, and adding a stone isolation net 10 at the intersection of the secondary drill hole and the primary drill hole;
step six: a water storage tank 15 is arranged at the bottom plate 14 of the machine/air way, water in the secondary sleeve 12 seeps out from the water seepage area 16, and the seeped water is collected by the water storage tank 15 and then is discharged through a pipeline;
step seven: and (3) after the drilling arrangement is finished, immediately carrying out dredging and descending work of the aquifer, and reducing the water level of the aquifer to be below a safety value so as to realize the closure of the water in the aquifer to the separated layer water accumulation area 11.
Preferably, the water drainage drill holes 7 are arranged in a region to be mined of the coal seam 6, the drilling machines are staggered by 100-150 m and are respectively arranged on the earth surface above the working face machine/air way 14, and the interval between the two drilling machines is 200-300 m.
Preferably, the sluicing drilling hole 7 acts on the aquifer which has direct and indirect influence on the working face, the water filling source of the aquifer overlying strata water accumulation area 11 above the working face is mainly aimed at, the water level dredging work is carried out on the aquifer, the water filling influence of the aquifer on the aquifer is reduced, the direct water filling influence of the aquifer on the working face is further eliminated, and therefore the threat of the aquifer overlying strata water accumulation area 11 on the working face is reduced.
Preferably, the secondary casing 12 is a thick-walled perforated pipe casing for absorbing water in an aquifer, and the secondary casing 12 can prevent a drilled hole from being blocked when the drilled hole passes through a mud rock stratum and can also prevent the hole body structure from being damaged due to the influence of rock stratum movement.
Preferably, the primary drilling hole is drilled to a position 10-20 m below the bottom boundary of the foundation layer 2.
Preferably, the water storage tank 15 is arranged below the bottom plate of the machine/air way 14 and serves as a temporary storage point for water in the drilled hole, and the drilled hole is drilled downwards to the position of the water storage tank 15 on the bottom plate of the working face machine/air way 14, so that the water in the drilled hole can be prevented from being sprayed into the crossheading or the working face, and the working environment is prevented from being deteriorated.
A caving zone 5 as in fig. 1 refers to a zone of rock formation where overburden from mining is damaged and caving into goaf, once called a caving zone.
In the first embodiment, the coal seam roof in the advanced mining section of the Yonglongyuan mine area is a mudstone type stratigraphic stabilizing group and a hard rock layer Yijun group which develop in a stable thickness and are soft and hard rock interphase; the two are in a combined structure with a hard top and a soft bottom. The distance between the coal bed and the Yijun group is 220-280 m, the cumulative thickness of the mudstone stratum accounts for 59-94% in the period, namely the mining area has the geological characteristics of a typical separated layer water-gushing mine, and in order to control the influence of separated layer space development on the stoping of a working face, drilling holes are arranged every 200-300 m along the advancing direction of the working face, so that the condition that water is changed from single point or small range or water outlet to multi-point or large range water outlet can be avoided.
By adding the high-strength crushed stone, the possibility of deformation, damage or blockage of the water drainage drill hole is reduced, and the water drainage channel can still be kept smooth without drilling periodic through holes.
A water storage tank is arranged on the bottom plate of the machine/air way and used as a temporary storage point of water in the hole, and the drilled hole is drilled to the water storage tank on the bottom plate of the crossheading of the working face, so that the water in the drilled hole can be prevented from being sprayed into the crossheading or the working face, and the working environment is prevented from being deteriorated.
The invention can fundamentally eliminate the influence of the separation layer, and the water level of the aquifer is reduced to be lower than the safety value by draining the water in the aquifer, thereby reducing the influence of the aquifer on the water filling of the separation layer and further reducing the water inrush danger of the separation layer on the working surface.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (6)
1. A method for advanced treatment of roof separation water damage of a stope by adopting ground drainage drilling is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: calculating the development height of the water guide crack belt (4) after the working face is mined according to the working face parameters and the stratum conditions, analyzing the stratum (3) which is likely to develop a separation layer, and judging the influence of a related aquifer on the water filling of the separation layer;
step two: drilling machines are respectively arranged on the ground surfaces corresponding to the machine/air tunnels (14) on the two sides of the working surface in a staggered mode at a certain distance;
step three: the drilling machine is used for vertically constructing and drilling holes from the top to the bottom of the earth surface, the drilling holes comprise primary drilling holes and secondary drilling holes, the diameter of the primary drilling holes is larger than that of the secondary drilling holes, primary sleeves (9) are embedded in the primary drilling holes, the primary drilling holes are drilled on a stratum (3) which is likely to develop a separation layer, and in order to prevent the influence of a loose layer (1) on the primary sleeves (9), a cement sealing area (8) is adopted outside the primary sleeves (9) for isolation and sealing;
step four: after the primary drilling is qualified, designing and constructing a secondary drilling, designing the aperture of the secondary drilling according to the stratum condition, and putting a secondary sleeve (12) into the secondary drilling and downwards drilling to the position of a water storage tank (15) of a bottom plate of a machine/air way (14);
step five: adding high-strength crushed stone (13) into the drilled secondary drill hole to prevent a mudstone layer in a stratum from softening and disintegrating when encountering water and entering the drill hole to cause plugging, avoiding damage to a hole body structure due to rock stratum movement caused by coal seam excavation, filling the secondary drill hole with the high-strength crushed stone (13), and adding a stone isolation net (10) at the intersection of the secondary drill hole and the primary drill hole;
step six: a water storage tank (15) is arranged at the bottom plate of the machine/air way (14), water in the secondary sleeve (12) seeps out from the water seepage area (16), and the seeped water is collected by the water storage tank (15) and is discharged through a pipeline;
step seven: and (3) immediately carrying out dredging and descending work of the aquifer after the arrangement of the drill holes is finished, and reducing the water level of the aquifer to be below a safety value so as to realize the closure of the water in the aquifer to the separated layer water accumulation area (11).
2. The method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling according to claim 1, which is characterized by comprising the following steps: the drainage drill holes (7) are arranged in a region to be mined of the coal seam (6), the drilling machines are respectively arranged on the ground surface above the working face machine/air way (14), and the interval between the two drilling machines is 200-300 m.
3. The method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling according to claim 1, which is characterized by comprising the following steps: the drainage drill hole (7) mainly acts on a water-bearing layer which has direct and indirect influence on a working surface.
4. The method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling according to claim 1, which is characterized by comprising the following steps: the secondary casing (12) absorbs water in the aquifer in a thick-wall floral tube casing mode, the secondary casing (12) can prevent a drilled hole from being blocked when the drilled hole penetrates through a mud rock stratum, and the damage to a hole body structure due to the influence of rock stratum movement can be avoided.
5. The method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling according to claim 1, which is characterized by comprising the following steps: and the primary drilling hole is drilled to a position 10-20 m below the bottom boundary of the foundation layer (2).
6. The method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling according to claim 1, which is characterized by comprising the following steps: the water storage tank (15) is arranged below the bottom plate of the machine/air channel (14) and serves as a temporary storage point of water in the drilled hole, and the drilled hole is drilled downwards to the position of the water storage tank (15) on the bottom plate of the working face machine/air channel (14), so that the water in the drilled hole can be prevented from being sprayed into the crossheading or the working face, and the working environment is prevented from being deteriorated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010815915.3A CN111894672B (en) | 2020-08-14 | 2020-08-14 | Method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling |
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| CN202010815915.3A CN111894672B (en) | 2020-08-14 | 2020-08-14 | Method for advanced treatment of roof separation water damage of stope by adopting ground drainage drilling |
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| CN111894672B true CN111894672B (en) | 2021-11-23 |
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| CN113187513B (en) * | 2021-05-10 | 2022-07-29 | 中国矿业大学 | Comprehensive treatment method for grouting and draining water damage of high-level separation layer of coal mine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042966A (en) * | 1988-12-01 | 1990-06-13 | 韦斯普里米森本亚克 | The underground space is the water discharge method in mining area particularly |
| CN106703880A (en) * | 2016-12-13 | 2017-05-24 | 中国矿业大学 | Straight-through guide drain hole for draining mining high-lying separated stratum water and construction method thereof |
| CN108999634A (en) * | 2018-07-26 | 2018-12-14 | 中国矿业大学 | Surface drilling realizes that a hole of water damage prevention and treatment and surface settlement control is mostly used method |
| CN109281707A (en) * | 2018-08-14 | 2019-01-29 | 中煤科工集团西安研究院有限公司 | A kind of advanced control method of face roof absciss layer water damage |
| CN209875205U (en) * | 2019-05-20 | 2019-12-31 | 山西潞安环保能源开发股份有限公司 | Drainage device for drainage drill hole of coal seam difficult to drain |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280000B1 (en) * | 1998-11-20 | 2001-08-28 | Joseph A. Zupanick | Method for production of gas from a coal seam using intersecting well bores |
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- 2020-08-14 CN CN202010815915.3A patent/CN111894672B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042966A (en) * | 1988-12-01 | 1990-06-13 | 韦斯普里米森本亚克 | The underground space is the water discharge method in mining area particularly |
| CN106703880A (en) * | 2016-12-13 | 2017-05-24 | 中国矿业大学 | Straight-through guide drain hole for draining mining high-lying separated stratum water and construction method thereof |
| CN108999634A (en) * | 2018-07-26 | 2018-12-14 | 中国矿业大学 | Surface drilling realizes that a hole of water damage prevention and treatment and surface settlement control is mostly used method |
| CN109281707A (en) * | 2018-08-14 | 2019-01-29 | 中煤科工集团西安研究院有限公司 | A kind of advanced control method of face roof absciss layer water damage |
| CN209875205U (en) * | 2019-05-20 | 2019-12-31 | 山西潞安环保能源开发股份有限公司 | Drainage device for drainage drill hole of coal seam difficult to drain |
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